BSD 2.11 - man page for renice (bsd section 8)

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RENICE(8)										RENICE(8)

       renice - alter priority of running processes

       renice priority [ [ -p ] pid ... ] [ [ -g ] pgrp ... ] [ [ -u ] user ... ]

       Renice  alters  the scheduling priority of one or more running processes.  The who parame-
       ters are interpreted as process ID's, process group ID's, or  user  names.   Renice'ing	a
       process	group causes all processes in the process group to have their scheduling priority
       altered.  Renice'ing a user causes all processes owned by the user to have their  schedul-
       ing  priority  altered.	 By  default, the processes to be affected are specified by their
       process ID's.  To force who parameters to be interpreted as process group ID's, a  -g  may
       be  specified.	To  force the who parameters to be interpreted as user names, a -u may be
       given.  Supplying -p will reset who interpretation to be (the default) process ID's.   For

	    renice +1 987 -u daemon root -p 32

       would  change  the  priority  of process ID's 987 and 32, and all processes owned by users
       daemon and root.

       Users other than the super-user may only alter the priority of processes they own, and can
       only  monotonically  increase  their  ``nice  value'' within the range 0 to PRIO_MAX (20).
       (This prevents overriding administrative fiats.)  The super-user may alter the priority of
       any  process  and  set  the priority to any value in the range PRIO_MIN (-20) to PRIO_MAX.
       Useful priorities are: 20 (the affected processes will run only when nothing else  in  the
       system  wants to), 0 (the ``base'' scheduling priority), anything negative (to make things
       go very fast).

       /etc/passwd    to map user names to user ID's

       getpriority(2), setpriority(2)

       Non super-users can not increase scheduling priorities of their	own  processes,  even  if
       they were the ones that decreased the priorities in the first place.

4th Berkeley Distribution		November 17, 1996				RENICE(8)
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